Gilbert lloyd adams



(No Model.)

G. L. ADAMS.

GAR BRAKE. a No. 326,191. Patented Sept. 1,5, 18815.

uw" i l gllwllllllllllllllllllmillll I m la Nrrnn STATES GILBERT LLOYD ADAMS, OF ALTOONA, PENNSYLVANIA, ASSIGNOR OF ONE-THIRD TO ALEXANDER & HERR.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 326,191, dated September l5, 1885.

Application filed October 22, 1884. (No model.)

To all whom, it may concern:

Be it known that I, GILBERT LLOYD ADAMS, of Altoona, in the county of Blair and State of Pennsylvania, have invented a new and useful Improvement in Car-Brakes, especially designed for use on freight-cars; and I hereby declare the following to be a full and clear description thereof.

This invention relates to the construction and arrangement of the levers for operating the brake and the general mechanism and construction of the parts connected therewith.

The invention will be readily understood by reference to the accompanying drawings, of which- Figure 1 is a plan View of a car-truck fitted with the improved brake appliances. Fig. 2 is a longitudinal sectional elevation taken on the line :v a: of Fig. 1, just at one side of the central pivot block or fulc'rum, which is attached to the central spring-beam of the truck. Fig. 3 is a front elevation of the spring-beam and the brake devices, the wheels and other parts of the truck being removed for the sake of perspicuity. In this View are clearly shown the fulcrum-plates of both primary and secondary levers, and also the vertical arms to which the brakeshoes are attached. The brake-shoes are removed in this iigure, as well as parts of the truck. Fig. 4 is an elevation of the brakeshoe detached from the other parts. Fig. 5 is a detailed view showing a side elevation of the brakeshoe and the vertical arm to which the shoe is hung, the two parts coupled together as in use.

The truck, as is usual, has a central bolster or spring-plank, A, made either in one or two parts, with end frames, B, in which the axles of the wheels C have their supporting or bearing boxes.

To the central part of the beam A, near its bottom edge, if there is only one'beam, or, if there are two, near the bottom edge of the lower beam, is secured a fulcrum-block, D, one on each side o f the beam, to which fulcrum-blocks are pivoted the lower ends of the two actuating-levers E. There are also secured to each side of the beam A, just inside of the wheels, two vertical arm-pieces, F, one near each end of the beam. These arm-pieces provide fulcrumblocks for the secondary levers G, as shown in Figs. l and 3, and also, by means of their upwardly-extending arms, attachmentsupports for the brake-shoes, as shown bestinv Fig. 5. The brake-shoes H are hung to the upper ends of the arm-pieces F either by links I, as shown in Fig. 2, or, in lieu of them, an arm or connection piece cast solid with the brakeshoe. In either case the brake-shoe is allowed a swinging or pendulous movement on the coupling pin or pivot/i, on which it is suspended at the top end of the arm F. The rear or outside of each brake-shoe has a pair of lugs, h, extending rearwardly, and a small slot formed between these two lugs forms the seat` of the secondary lever G. The free or moving ends of the levers G on each side of the beam A are coupled in an assembling-clevis, G', by

Ja pivot or coupling pin, g, and a slot in the other side of the said assembling clevis-piece receives the actuating-lever E, which is connected to the said @levis-piece by an assembling-bolt, e.

As is clearly shown' in the drawings, the actuating-lever E, coupled with the secondary levers G, form a set of compound levers for applying pressure to the brake-shoes. There is one of these setsvof compound levers on each side of the central beam, A, as is clearly shown in Fig. 1. The two sets of'componnd levers are actuated simultaneously, so as to apply all of the brakes of a single truck to the wheels of that truck at the same moment. For this purpose an operating cord, chain, or rope, (preferably of wire,) J, is attached to the top end of one ofthe levers E, and is thence taken over to and run around a sheave, J', attached to the top end ofthe other actuatinglever, and thence it is conducted back to the operating brakerod, (not shown,) and by tightening up the said cord or chain J the levers E are both drawn together, and thereby move the coupled secondary levers G,so as to apply all of the brakes simultaneously.

The fulcrum-pieces D and the clevis-pieces G have several holes formed through them for the accommodation of the assembling pins or bolts to several different positions, so as to form an adj ustmentror take-up for the parts as they become Worn by use.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The brake-levers G, fulcrume-d to the c entral bolster or spring-beam, A, and arranged to have their shorter arms press the brakeshoes H against the Wheels, and their longer arms actuated by primary levers E, which are also fulcrumed to the central bolster or springbeam, A, and operated by a single chain or cord, J, which is operated so as to draw together the free or moving ends of the primary levers E, substantially as shown and set forth.

2. The levers E and G, respectively fulerumed to the central beam, A, and the ends of the levers G coupled bylinks or cleviscs G to the central part of the levers E, so that when pressure is applied to the `said levers the fulerum-strains are all pressing against the central beam, A, and with equal force to each side of it, substantially as shown and set forth.

3. The hanger-pieces F, secured to the sides of the beam A near its ends, and constructed 25 GILBERT LLOYD ADAMS.

In presence of- VVILLIAM STOKE, MILTON ALEXANDER. 

